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    12th TREX meeting [Forward experiments actiities during TS2-2016]

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    12nd TREX meeting, 15/07/2016  DRAFT, writing on-going:

    Attendance list (tour de table) M. Lamont, P. Fassnacht (EP/ADO), M. Rijssenbeek (EP/ADO), G. Bregliozzi (TE/VSC), J. Baechler, C. Adorisio (HSE/RP), G. Corti (EP/LBD), F. Sanchez Galan (EN/EA), P. Baranowska (EN/ACE), M. Bernardini (EN/ACE), C. Schwick (LPC), D. Lazic (CMS)

    • 1- Introduction-access to LSS during TS2.

    M. Lamont explains that the main motivation for this meeting is Stephan's Roessler presentation about radiation levels presented at the 22 June 2016 LMC.

    In particular measures done between Q2 and Q3 show current leves are above 50 µSv/h, which is a concern for interventions. With that levels, the region between Q5 and Q5 is considered "limited stay", and a dose study based on the analysis of the activities needs to be performed before each intervention.

    C. Adorisio pointed that athough 2 days cooling time reduces the levels, it is not enough to change the classification of the zone. (One week is the minimum needed to  do it). The radiation dose maps are available under request.

    J. Baechler commented that the workers feel a bit umconfortable when working in the Roman Pots, C. Adorisio answered that such levels are not a concern at all, but if needed an study about the activity could be done.

    M. Bernardini informed that from the moment we have the mapping, the activities performed within the Limited Stay need to be discussed in the coordination meeting. The work and dose plan is compulsory for Limited Stay regions and need to be included in the IMPACT.

    • 2- Installation of a passive ZDZ module in the TAN-IR1

    Aim is to test liquid radiators under radiation conditions, the Cu shielding will be replaced for W, with an equivalent shielding performance. An ECR draft was sent to ZDC team. P. Baranowska asked if it is already circulating and suggested that Anne-Laure Perrot should be included in the list).

    D. Lazic commented that the purity of the fibers used is a key parameter. (it should be less than 10 ppm) because they will get around 1 Ggy per month.

    C. Adorisio pointed out that from RP, the only request is to be fully compatible with the ZDC crane (in particular, same hook, same installation procedure) and be ready in TS3 with a sarcophague for removal.  Installation can be done the last day of TS2 (less dose) or even later,, but everything needs to be ready for full remote handling during installation and dismanting.

    • 3 -TOTEM/CT-PPS

    J. Baechler did a quick overview of the main activities in 2016, (cable damaged at 180 m done before LS1) and focused in the next TS2 starting in week 37

    Slide 3: Diamond detectors task in TS2 was revised, now they will concentrate on (see slide 4)

    Lifetime of Si strip detectors is around 10 fb. In an ideal world the detector at 210 m would be chaged tomorrow and will wait.

    Slide6, vertical position... G. Bregliozzi gave the green light  if an X-ray is performed after the operation. This will be officialised in a LMC.

    J. Baechler informed that the Diamond detectors are fully implemented but the read-out is not finished, a "in-situ" firmware update is needed. The time of access needed for this operation should be in the range of 1-2h at most, but people was not sure about the dose taken at the operation ( 12µSv/12h)

    C. Adorisio pointed out that these levels of dose are no concern, and staying close to the Roman Pot staton is ok. If it is closed to the TCL she needs to check the dose.

    G. Bregliozzi commented that alignment and baking operations of the Roman Pots close to TCL should be performed, which according to C. Adorisio are also no concern.

    M. Bernardini informed that in any case, all activity to be performed between Q5 and Q5 needs a short discussion with RP.

    • Short Statement from ALFA

    There's no problem foreseen for ALFA as they are out of the Q5-Q5 sector and TCL6 is not a problem in terms of dose for the moment.

    • AFP

    AFP is close to TCL6, so the dose rate is not expected to be high in TS2.

    Slide 2. G. Bregliozzi commented that VSC will do the table, ad the ECR needs to be done by AFP. For the time being, the ECR will be put in stand-by and will go to VSC which will implement the changes. The installation in EYETS should not be done too late because they need to foresee time for commissioning. M. Bernardini answered that apart from the cabling, everything can start from the day 1.

     

     

     

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